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[doo-nahyt, duhn-ahyt] /ˈdu naɪt, ˈdʌn aɪt/
a coarse-grained igneous rock composed almost entirely of olivine.
Origin of dunite
1865-70; named after Mt. Dun in New Zealand, where it is found; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dunite
  • dunite with alteration rind of talc and brucite from.
  • Serpentine is a metamorphic rock derived from dunite and similar rocks.
  • Amphibolite and chert tectonic blocks also occur in the dunite near the area's southern and western boundaries.
British Dictionary definitions for dunite


an ultrabasic igneous rock consisting mainly of olivine
Word Origin
C19: named after Dun Mountain, a mountain in New Zealand where it is abundant
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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dunite in Science
  (d'nīt', dŭn'īt')   
A coarse-grained igneous rock that consists mainly of olivine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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